Emergency Nurse Practitioner (ENP) Practice Test

What does NPA overlay provide as a solution?

1. A method to integrate new area codes in different geographic areas

2. An opportunity to upgrade phone network infrastructure

3. A way to retain phone numbers while changing carriers

4. A possibility to introduce a new area code in the same geographic area

The correct answer is: A possibility to introduce a new area code in the same geographic area

The correct response identifies the NPA (Number Planning Area) overlay as a strategy that allows for the introduction of a new area code within the same geographic area where an existing area code operates. This approach is particularly useful when the demand for phone numbers exceeds the availability within a specific region. By implementing an overlay, service providers can continue to assign new phone numbers without requiring customers to change their existing numbers. This preserves the current phone numbering system, ensuring minimal disruption for users in that area. The other options do not accurately reflect the primary purpose of an NPA overlay. For instance, integrating new area codes or upgrading network infrastructure are not the primary functions of an overlay. Additionally, retaining phone numbers while changing carriers pertains more to number portability rather than the specifics of area code management.